exhaust piping 2.5 inch or 3inch

[yung]

want to ask and body try be4 the exhaust piping 2.5 inch or 3 inch will be better ????

 

[AvanT]

Hi Yung,

Welcome to our new Airtrek Club.
Better in terms of what? it depends on what U want; silence, comfort, fuel economy, power, louder exhaust note, looks, etc.

I presume U intend to change the rear muffler as well, since U're asking this question...heheee.

U can check with bro kaninbu, he is looking for someone to trade/buy a stock muffler.
http://www.zerotohundred.com/newfor...uying-or-trade-ori-airtrek-turbo-muffler.html

 

[stutzedward]

If you're planning mild modification like exhaust, filter, intercooler and increased boost only, then 2.5" is the best. It still retains the low end torque as well as preserve city-drivability.

If you're going for more serious mod like 2.2L stroker, big turbo, high-cams, higher fuel inject etc etc to reach the 'above 350hp' mark.. then 3" will be good for you. Usually at this point, the trek is no longer auto.

 

[yung]

If you're planning mild modification like exhaust, filter, intercooler and increased boost only, then 2.5" is the best. It still retains the low end torque as well as preserve city-drivability.

If you're going for more serious mod like 2.2L stroker, big turbo, high-cams, higher fuel inject etc etc to reach the 'above 350hp' mark.. then 3" will be good for you. Usually at this point, the trek is no longer auto.

If I only change cam kelford , independent ignition coil means direct coil that each cylinder have 1 coil,Walbro, regulator lighten crank pulley , what is the diameter is suitable ???
Plz help I think this about 2 mont Ady ...hahaha

 

[stutzedward]

I guess it'll be good to retain at 2.5" based on your mods. What are the cam degrees? If you're going above 27x, does that means u will have plans for hardcore mods in future?

 

[kaninbu]

change higher cam need proper tuning.if not u lose alot low end torque.sluggish at low speed.
airtrek ori piping is 2.5inch.if u change ur cam to higher degree,u need better air flow/exhaust system.2.8 is a must.
msd ignition?confirm going 300whp lo.no point changing if mild mod.ori is very sufficient.
nonit stroker kit also nevermind.
wif ur current upgrade,u r goin 280whp boosting 1.5bar with additional higher cc injector,bigger turbo,fmic

 

[yung]

change higher cam need proper tuning.if not u lose alot low end torque.sluggish at low speed.
airtrek ori piping is 2.5inch.if u change ur cam to higher degree,u need better air flow/exhaust system.2.8 is a must.
msd ignition?confirm going 300whp lo.no point changing if mild mod.ori is very sufficient.
nonit stroker kit also nevermind.
wif ur current upgrade,u r goin 280whp boosting 1.5bar with additional higher cc injector,bigger turbo,fmic

thx for the info....i am using the brand car speed ignition coil have 4 coil ady.u can search at google also about the car speed brand...that mean 2.8 inch is the most suitbale on my mod???

 

[kaninbu]

if change additional higher cc injector,bigger turbo,fmic then u need 2.8inch..if not 2.5 for temp being.ur upgrade gantung 1/2 way.

 

[yung]

I guess it'll be good to retain at 2.5" based on your mods. What are the cam degrees? If you're going above 27x, does that means u will have plans for hardcore mods in future?

No ....I only will mod this only

 

[stutzedward]

2.5" is the one for you, that's what I wud recomend.